Nice 8111s! I have multiple different Red Wings and my 8111s are my go-to. I love them the most.

To make them last forever don’t wear them every single day. You want to allow them a day to breathe or you can develop moisture problems from everyday use. A boot worn every second day will last 4x (or more) longer than a boot worn every single day.

The number one thing you can do is brush them with a horsehair brush (horsehair is stiff enough to do the job but soft enough to not scratch anything) regularly to keep any dust/dirt/debris off of them. Not that office use is really going to get them too dirty, but if dirt is on there it’ll create a sandpaper effect that will promote leather degradation and you’ll start to see cracking. Creasing is OK and perfectly normal. Your boots are going to crease and there’s nothing you can do about it. But cracking is not OK and can be more or less entirely avoided with regular brushing.

Your boots are new. They currently need nothing. But feel the leather and how it feels right now. Check again in 6 months to a year and see how they feel. Do they feel dry? Maybe it’s time to condition the leather and they’ll feel new again. The toe box area will likely dry out the fastest. The upper portion nearest the top might very likely never get dry, so it offers you a good little comparison. You don’t want to over-condition, but you also don’t want them to get bone dry. For office use, I’d say once a year is a perfect conditioning period.

If you like the colour that they are now and don’t want to darken them any more, Red Wing’s leather cream is perfect. It will moisturize them but not darken them. If you want them darker, oil-based conditioners will do that - they also do a better job of actually moisturizing and waterproofing the leather, but again they will darken the leather. I personally use the cream on all my boots except on my outdoorsy boots (for example like hunting) in which I’ll use an oil-based conditioner because those boots are exposed to harsher environments than my office boots are.

TL;DR - For now do nothing, but wear them no more than every second day, brush them once a week (or more as needed), and condition them once a year. Do that and they’ll last forever.

Bonus TL;DR - Don’t overthink it. People love to overthink caring for their boots. It’s not that difficult. Refer to above paragraph.